Does it support special characters and emojis?

Base64 Encoder

Runs in Your Browser

Encode text strings, JSON data, or credentials into standard RFC 4648 Base64 or URL-Safe Base64 with complete UTF-8 Unicode support.

Browser-based: this tool works on your device and does not send your input to an Alona Tool server. See the Privacy Policy for details.

Fast Processing

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Basic Auth string

Input Scenario:

admin:SuperSecret

Generated Result:

YWRtaW46U3VwZXJTZWNyZXQ=

Converts UTF-8 character bytes into 6-bit binary chunks mapped to the 64-character ASCII alphabet.

Yes! Our implementation uses full UTF-8 byte encoding so emojis and non-Latin scripts encode without errors.

Decode Base64 encoded strings back into clean plain text

Encode special characters for URLs or decode query strings

Generate cryptographically secure random passwords

Test password resilience

Encode payloads for HTTP Basic Auth headers, data URIs, and API requests.